EVIDENCE-BASEDAWAITING CLINICIAN REVIEW

Hepatitis

Hepatitis means inflammation of the liver. Viruses—especially hepatitis A, B and C—are major causes worldwide, but alcohol, medicines, toxins, autoimmune disease and metabolic disorders can also inflame the liver. The implications range from a short self-limited illness to chronic infection, cirrhosis, liver cancer or acute liver failure.

At a glance

Quick facts

Condition snapshot
Meaning
Liver inflammation
Major viral types
A · B · C · D · E
Vaccines
Available for hepatitis A and B
Chronic infection
Important in B and C
Curative antiviral therapy
Hepatitis C in most patients
Emergency complication
Acute liver failure

Names & terminology

How this entity may be named or searched

Hepatitis
Inflammation of liver tissue; the word does not specify the cause.
Viral hepatitis
Hepatitis caused by hepatitis viruses A, B, C, D or E.
Acute vs chronic
Acute hepatitis is recent inflammation; chronic hepatitis persists and can lead to fibrosis/cirrhosis.
Hepatitis vs jaundice
Jaundice is yellowing from bilirubin accumulation and can occur in hepatitis, but many people with hepatitis are not jaundiced.

Structured entity profile

Clinical profile

Condition data
OrganLiverInflammation can impair detoxification, metabolism, protein synthesis and bile handling.
Viral transmissionVaries by virusA/E are mainly fecal–oral; B/C are primarily blood/body-fluid related.
SymptomsOften absent or nonspecificFatigue, nausea, abdominal discomfort, dark urine and jaundice can occur.
DiagnosisLiver tests + cause-specific testingSerology and nucleic-acid tests distinguish viral types and active infection.
TreatmentCause-specificSupportive care, antivirals, immune treatment or stopping a toxic exposure may be needed.
Long-term riskFibrosis, cirrhosis, liver cancerEspecially with chronic hepatitis B or C.

Overview

Hepatitis is a pathologic process rather than one disease. Viral hepatitis A is usually an acute infection spread mainly by the fecal–oral route and does not become chronic. Hepatitis B can be acute or chronic and is transmitted through blood and body fluids, including perinatal transmission. Hepatitis C is primarily blood-borne and frequently becomes chronic if untreated. Hepatitis D occurs only in people with hepatitis B infection, while hepatitis E is mainly enterically transmitted. [1] [2] [3]

Nonviral hepatitis includes alcohol-associated hepatitis, drug-induced liver injury, autoimmune hepatitis, ischemic hepatitis and metabolic disease. Because symptoms and liver-enzyme patterns overlap, identifying the cause is essential before assuming that “hepatitis” means a viral infection. [1] [4]

Symptoms and warning signs

Many infections cause no symptoms. When present, symptoms can include fatigue, poor appetite, nausea, vomiting, fever, right-upper-abdominal discomfort, dark urine, pale stools, joint pain and jaundice. Severe drowsiness, confusion, easy bleeding, rapidly increasing abdominal swelling or vomiting blood can indicate decompensated or acute severe liver disease and require urgent assessment. [1] [2] [3]

SYMPTOM MATRIX

Hepatitis can be silent until testing reveals liver inflammation

Symptoms do not identify the hepatitis virus or distinguish viral from nonviral causes.

Liver disease
Possible acute symptoms
  • Fatigue
  • Loss of appetite
  • Nausea or vomiting
  • Right-upper-abdominal discomfort
  • Dark urine
  • Jaundice
Chronic disease clues
  • No symptoms
  • Persistent abnormal liver tests
  • Easy bruising
  • Itching
  • Abdominal swelling
  • Signs of cirrhosis
Emergency liver-failure signs
  • New confusion or extreme drowsiness
  • Bleeding / vomiting blood
  • Rapidly worsening jaundice
  • Severe abdominal swelling
  • Collapse or severe systemic illness

Acute liver failure and decompensated cirrhosis require urgent hospital assessment.

Diagnosis

Initial testing usually includes ALT, AST, bilirubin, alkaline phosphatase, albumin and clotting measures such as INR. The pattern and severity help distinguish hepatocellular injury from cholestatic disease and identify impaired synthetic function. A medication, supplement, alcohol and exposure history is essential. [1] [4]

Viral testing is specific: hepatitis A IgM identifies recent HAV infection; hepatitis B uses HBsAg, anti-HBc and other markers, with HBV DNA for active viral replication; hepatitis C screening starts with HCV antibody followed by HCV RNA to confirm current infection. Ultrasound and other imaging assess biliary disease, cirrhosis or masses, and selected patients need elastography or liver biopsy. [1] [2] [3]

Diagnostic pathway

Confirm liver injury, then identify the specific cause

A “hepatitis panel” is only one part of the evaluation because many causes are nonviral.

Liver work-up
1Assess severityCheck liver enzymes, bilirubin, INR, albumin and signs of encephalopathy or decompensation.
2Take exposure historyReview alcohol, medicines/supplements, travel, food/water, blood and sexual/perinatal risk.
3Use cause-specific testsOrder hepatitis serology/RNA-DNA tests and autoimmune/metabolic testing as indicated.
4Stage chronic diseaseUse fibrosis assessment, imaging and cancer surveillance when chronic liver disease is established.
Current HCV infectionHCV RNAafter antibody screen
HBV activityHBV DNAplus serologic profile

Interpreting hepatitis B serology requires the pattern of several markers; one isolated result can be misleading.

Hepatitis A, B and C: key differences

Hepatitis A: acquired mainly through contaminated food, water or close contact; it does not become chronic and vaccination prevents infection. Hepatitis B: transmitted through blood and body fluids and during birth; chronic infection risk is highest when acquired in infancy, and vaccination is highly effective. Hepatitis C: primarily blood-borne; there is no vaccine, but modern direct-acting antivirals cure most treated patients. [1] [2] [3]

Nonviral hepatitis

Alcohol can cause steatohepatitis and severe alcohol-associated hepatitis. Acetaminophen overdose and many prescription, over-the-counter and herbal products can cause drug-induced liver injury. Autoimmune hepatitis results from immune attack on liver cells and generally requires immunosuppression. Ischemia, metabolic disease and pregnancy-specific liver disorders are other examples. [4]

Treatment and management

Treatment follows the cause. Hepatitis A is generally managed with supportive care because the infection resolves without chronic carriage. Chronic hepatitis B can be suppressed with antiviral therapy in patients who meet treatment criteria, reducing progression and transmission risk; some patients need long-term therapy. Hepatitis C is treated with short courses of direct-acting antiviral combinations that cure the great majority of patients. [1] [2] [3]

Nonviral causes require different treatment: stop a causative toxin or medicine when safe, treat acetaminophen toxicity urgently, use immunosuppression for autoimmune hepatitis, and manage alcohol-associated disease with abstinence and specialized care. Any acute hepatitis with impaired clotting, encephalopathy or rapidly worsening bilirubin requires urgent specialist or transplant-center assessment. [4]

Treatment & care hub

Treat the specific hepatitis cause and protect the liver

Vaccines prevent some viral hepatitis; antivirals suppress or cure others.

Cause-directed liver care
HAVPreventable

Vaccinate + supportive care

Hepatitis A vaccination prevents infection; established acute disease is usually supportive care.

HBVSuppressible

Use antivirals when treatment criteria are met

Long-term viral suppression reduces liver injury and transmission risk in appropriate patients.

HCVCurable

Treat with direct-acting antivirals

Modern oral regimens cure most people with current hepatitis C infection.

NonviralCause specific

Remove the trigger or treat immune/metabolic disease

Alcohol, medicines, autoimmunity and ischemia require entirely different management.

Identify type→Assess severity→Treat cause→Prevent complications

Antiviral eligibility, regimen and duration depend on virus, fibrosis, pregnancy, kidney function, drug interactions and local guidance.

Vaccination and transmission prevention

Vaccines are available for hepatitis A and B. Hepatitis B vaccination also prevents hepatitis D because HDV requires HBV. Hepatitis C has no vaccine, so prevention relies on safe injection and medical practices, avoiding shared injecting equipment, screening blood supplies and testing people with relevant exposures. [1] [2] [3]

Long-term care after chronic hepatitis

People with chronic hepatitis B or C-related advanced fibrosis need long-term assessment even when viral replication is controlled or HCV is cured, because established cirrhosis can continue to confer hepatocellular-carcinoma and decompensation risk. Follow-up may include liver tests, fibrosis assessment, ultrasound-based cancer surveillance and management of alcohol and metabolic risk. [2] [3]

Prevention and cure

Hepatitis A and B are vaccine-preventable; hepatitis C is usually curable with treatment

The major viral hepatitis types differ fundamentally in transmission, chronicity and treatment.

CDC — Viral Hepatitis Basics ↗
Vaccines availableA + BHBV vaccine also prevents HDV
HCV vaccinenone
HCV treatmentcurative for most
Scope: This panel summarizes major clinical differences rather than combining distinct viruses into a single prevalence statistic.

Common questions

Frequently asked questions

Reference content

Sources

  1. CDC — Viral Hepatitis Basics
  2. WHO — Hepatitis B fact sheet
  3. WHO — Hepatitis C fact sheet
  4. NIDDK — Viral Hepatitis

This article is based on trusted medical sources and is awaiting clinician review. It is not a substitute for personalized medical advice.